The possibilities of more advanced contracts are to have time-based tokens for timebanks, real-world based assets, actual Non-Fungible tokens etc. Instead of just a debit/kredit database like Fiat, or a virtual currency having the same name and about the same "value".

Surely many currencies are based on USD, like Euro, the constant inflation does go hand in hand with HBD. For simplicity it is a good option, but for people outside the US it can be confusing.

Internalization is a big thing in tech, one usual practice is to give the option to choose the preferred currency. Have been warching the project evolve for years, just giving ideas for the future.